The 100 season 1 has built up to the battle between the 100 and the Grounders. It's going to be a brutal fight and many lives will be lost. I had the opportunity to screen the finale and it will keep you on the edge of your seat from beginning to end. It's a heartwrenching hour. Blood will be spilled, sacrifices made and goodbyes exchanged.

After watching The 100 season finale, I jumped on the phone with Executive Producer Jason Rothenberg to get the scoop about the dangers the group faces with the Grounders closing in, Bellamy and Clarke's leadership relationship and if fans should fear for their characters' lives.

Read on for some insight into the finale and stop back at BuddyTV for more answers from Rothenberg after the finale airs.

Bellamy and Clarke have very different opinions on what the group should do next. Their leadership relationship has grown immensely, where are they at going into the finale?

I think Clarke's perspective is informed hugely by what she just went through in the previous episode, in the first half of the finale, episode 12. She was with with Grounders, she's seen the world, she knows what's out there. Bellamy, for better or worse, has been hunkered down in that camp and so they have different opinions on how to handle it. And, ultimately the choice is taken away from them.

It's one of the things we did well this year was that evolving dynamic in terms of leadership between Bellamy and Clarke. One of the things that I loved the most about the show and certainly about Bellamy and Bob Morley's performance is how nuanced it is and how much he's gone from a guy who was essentially just a douche in the premiere to someone who's almost like a full on legitimate hero by the finale. So that's quite a magic trick to pull off in one season.

Likewise, I think it's interesting that Clarke started out virtuous and pure and all theoretical and now she'd gotten her hands dirty, literally has blood on her hands. In many ways, I think they're going in opposite directions and one of the things that Clarke has learned is that leadership is hard and you have to get dirty sometimes to forward the progress of the group. To keep everyone alive, some people have to die is essentially what she's learning sadly.

Death isn't anything new for this series, going into this battle should fans fear for the lives of their favorite characters?

Yeah. I think they should fear for everybody's lives. Death, if that wasn't a possibility then it really wouldn't have the stakes that it has. A show like Game of Thrones or The Walking Dead, which are two of my favorites, one of the things that makes that such a visceral experiences is that you really don't know.

It always has you uneasy about how a scene is going to end, because frankly they have proven they will, I'm talking about Game of Thrones primarily now, they've proven that people that you love can be taken away. And, it's a little bit of that model for us and I think it really does keep the drama alive and crackling if you just can't figure it out. If you can't predict it.

The situation on the Ark is dire as well. Check out a sneek peek of Jaha informing people about his plan to bring the Ark to Earth.